Testing Vert.x applications

To test our Vert.x application, we’ll use the JUnit 5 framework, which we discussed in the previous chapter.

You’ll need the following two dependencies in your build.gradle.kts file:

dependencies { ... testImplementation("io.vertx:vertx-junit5") testImplementation("org.junit.jupiter:junit-jupiter:5.9.1") testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-  test:1.8.0") } 

Our first test will be located in the /src/test/kotlin/ServerTest.kt file.

The basic structure of all the integration tests looks something like this:

@TestInstance(TestInstance.Lifecycle.PER_CLASS) class ServerTest { private val vertx: Vertx = Vertx.vertx() @BeforeAll fun setup() = runTest { vertx.deployVerticle(ServerVerticle()).coAwait() } @AfterAll fun tearDown() { // You want to stop your server once vertx.close() } @Test fun...